The bell the end of the class rang our heated discussion. A. indicating interruptingB.

问题补充：

The bell the end of the class rang, our heated discussion.

A. indicating, interrupting

B. indicated, interrupting

C. indicating, interrupted

D. indicated, interrupted

答案：

(答案→)A. indicating, interrupting

B. indicated, interrupting

C. indicating, interrupted

D. indicated, interrupted

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